Qt、Opencv环境下，演示连续范数的计算，绘制和显示。可以连续演示范数L1,L2,L3,L4.....L无穷，对于教学演示非常有用-Under Qt, Opencv environment, demonstrate continuous norm calculate the number of rendering and display. Can continue to play an norm L1, L2, L3, L4 ..... L infinity, is very useful